IP lookup tool
Find out who owns an IP address: the network and organisation from the regional internet registry, its CIDR block, country, abuse contact and reverse DNS name.
Your own IP is pre-filled. Press Look up, or enter any address or hostname.
Who hands out IP addresses
IANA allocates large blocks to five Regional Internet Registries: ARIN (North America), RIPE NCC (Europe, Middle East, Central Asia), APNIC (Asia-Pacific), LACNIC (Latin America) and AFRINIC (Africa). They assign smaller blocks to ISPs, hosting companies and large organisations, and record each assignment. That record is what this lookup returns.
Reading the result
- Organisation tells you the network operator, not the end user: an address owned by "Amazon Technologies" is someone's EC2 server, not Amazon itself.
- Reverse DNS often encodes more:
…static.ip.provider.netvs…dynamic…, or airport codes of the data centre. - Private ranges (10/8, 172.16/12, 192.168/16, 100.64/10, fc00::/7) never appear on the public internet.
Questions people ask
What does an IP lookup tell me?
Who holds the address block (an ISP, cloud provider or company), the exact CIDR range, the registered country, the abuse contact for reporting spam or attacks, and the reverse-DNS hostname, which often names the provider and sometimes the city or server role.
Where does this data come from?
From the five Regional Internet Registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC) via RDAP, their official lookup protocol, plus a live PTR query. It is registration data, so it is authoritative about ownership.
Can I find the exact location of an IP?
No lookup can. Commercial geolocation databases estimate a city, but accuracy is limited and often wrong for mobile and VPN addresses. The registered country here is where the block is administered, which usually but not always matches where it is used.
How do I report abuse from an IP?
Email the abuse contact shown in the result with timestamps (including time zone), the IP, and log excerpts. For cloud providers (AWS, Google Cloud, Azure, DigitalOcean), use their dedicated abuse forms for faster handling.